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公开(公告)号：US20040129181A1
公开(公告)日：2004-07-08
申请号：US10474930
申请日：2003-10-14
发明人： Jean-Marie Lalande , Anne Tremblay
IPC分类号： C04B002/10 , C04B007/60
CPC分类号： C04B7/367 , B01D53/62 , B01D53/84 , B01D2257/504 , Y02A50/2358 , Y02C10/04 , Y02P40/121 , Y02P40/18 , C04B7/365 , C04B7/436 , C04B2103/0001
摘要： A process is disclosed for producing cement clinker, comprising the steps of: a) providing a mixture of ground calcareous materials and ground argillaceous materials; b) heating the mixture of step a) to a temperature sufficient to calcine and fuse the ground materials to form the cement clinker, and thereby producing an exhaust gas containing CO2; c) catalysing the hydration of at least a portion of the CO2 contained in the exhaust gas and producing a solution containing bicarbonate ions and hydrogen ions; and d) adding to the solution obtained in step c) metal ions, and adjusting the pH of the solution to precipitate a carbonate or said metal. Preferably, the metal ions are Canullnull obtained from the dissolution of a material selected from the group consisting of CaCl2, cement kiln dust and sea salts and the carbonate is CaCO3 which is advantageously recycled into the process by adding the CaCO3 to the mixture of step a). A cement plant for performing this process is also disclosed.
摘要翻译： 公开了一种用于生产水泥熟料的方法，包括以下步骤：a）提供磨碎的钙质材料和研磨的泥质材料的混合物; b）将步骤a）的混合物加热到足以煅烧和熔化研磨材料以形成水泥熟料的温度，从而产生含有CO 2的废气; c）催化废气中所含CO 2的至少一部分水合，并产生含有碳酸氢根离子和氢离子的溶液; 和d）加入步骤c）中获得的溶液中的金属离子，并调节溶液的pH以沉淀碳酸盐或所述金属。 优选地，金属离子是从溶解选自CaCl 2，水泥窑灰和海盐的材料获得的Ca ++，碳酸盐是CaCO 3，其有利地通过将CaCO 3加入到该方法中再循环到该方法中 步骤a）的混合物。 还公开了用于执行该方法的水泥厂。
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公开(公告)号：US20040040472A1
公开(公告)日：2004-03-04
申请号：US10234486
申请日：2002-09-03
发明人： Donald Everett
IPC分类号： C04B002/10 , C04B007/26
CPC分类号： C04B7/243 , C04B7/436 , Y02P40/145 , C04B7/428 , C04B7/425
摘要： A method of recycling cement kiln dust (CKD) generated during the direct manufacturing of cement. The recycling process utilizes the creation of a flowable slurry comprising CKD, a process aid, optionally other raw materials and water. The process aid is selected from the group consisting of sucrose, raffinose, lignin, methylglucopyranoside, lactose, fructose, sodium polyphosphate, trehalose and mixtures thereof, and is added to increase the flowability of the slurry and thereby simplifying recycling. The slurry is reintroduced into the cement kiln, wherein it is burned to create cement clinkers, that are subsequently ground to the fineness required for hardening when reacted with water.
摘要翻译： 在水泥直接生产过程中产生的水泥窑灰（CKD）回收方法。 回收过程利用了可流动浆料的生成，其包括CKD，加工助剂，任选的其它原料和水。 加工助剂选自蔗糖，棉子糖，木质素，甲基吡喃葡萄糖苷，乳糖，果糖，多磷酸钠，海藻糖及其混合物，并加入以提高浆料的流动性，从而简化回收。 将浆料重新引入水泥窑中，其中它被燃烧以产生水泥熟料，随后在与水反应时被研磨成硬化所需的细度。
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公开(公告)号：US4249952A
公开(公告)日：1981-02-10
申请号：US126189
申请日：1980-03-03
CPC分类号： C04B7/436 , C04B18/162 , C05D1/00 , Y02W30/95
摘要： A method is disclosed for obtaining useful products from cement kiln waste dust. The dust is collected and added to an electric arc furnace where it is melted. The temperatures required to melt the dust are sufficiently high that alkali sulfates present in the dust are volatilized, leaving a melt which has a composition acceptable for the production of cement clinker. The volatilized components are collected to form a second useful product; i.e., a potassium rich material suitable for the production of potassium bearing chemicals, such as fertilizers.
摘要翻译： 公开了一种从水泥窑废粉中获得有用产品的方法。 将灰尘收集并添加到电弧炉中，在其中熔化。 熔化粉尘所需的温度足够高，使得存在于灰尘中的碱性硫酸盐挥发，留下具有可用于生产水泥熟料的成分的熔体。 收集挥发的组分以形成第二有用的产物; 即适用于生产含钾化学物质的富钾材料，例如肥料。
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公开(公告)号：US3925534A
公开(公告)日：1975-12-09
申请号：US39380573
申请日：1973-09-04
申请人： WOODALL DUCKHAM LTD
摘要： This invention concerns a cement kiln flue dust treatment process comprising: in a first stage treating the dust with fresh water at an elevated temperature for such time as to dissolve the alkali metal chlorides, simultaneously carbonating to convert calcium hydroxide in solution to insoluble calcium carbonate, then treating the slurry thus formed in a second stage with additional water at an elevated temperature and for such time as to dissolve substantially all the remaining alkali metal sulphates, again simultaneously carbonating to convert calcium hydroxide in solution to the insoluble calcium carbonate, filtering the slurry from the second stage, and recovering potassium chloride and potassium sulphate as desired from the filtrate.
摘要翻译： 本发明涉及一种水泥窑烟道粉尘处理方法，包括：在第一阶段用高温下的淡水处理粉尘，使其溶解碱金属氯化物，同时进行碳酸化以将溶液中的氢氧化钙转化为不溶性碳酸钙， 然后在第二阶段用另外的水在升高的温度下处理如此形成的浆料，并且使其基本上溶解所有剩余的碱金属硫酸盐，同时进行碳酸化以将溶液中的氢氧化钙转化为不溶性碳酸钙，过滤浆料 从第二阶段，从滤液中回收氯化钾和硫酸钾。
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公开(公告)号：US2687290A
公开(公告)日：1954-08-24
申请号：US13685250
申请日：1950-01-04
发明人： GAROUTTE JOHN M , HASS PETER S
CPC分类号： C04B18/162 , C04B7/436 , Y02W30/95 , C04B7/40
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